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On 28/03/2006, at 9:54 AM, Simon Coulter wrote:

And look closely at the printed dates. Why are the second and third the
same date? Why does adding 1 month to 2006-01-31 not give 2006-02-28?
Easy to explain once you understand what is happening but I'd rather
have RPG's behaviour than Java's.

The last example used the Date class. Here is one using the Calendar class:

import java.util.*;
public class PraveenCalendar
{
  public static void main(String[] args)
  {
GregorianCalendar gc = new GregorianCalendar(2006, 0, 31); // Java's inconsistent counting practices
    System.out.println(gc.getTime());
    gc.add(Calendar.MONTH, 1);
    System.out.println(gc.getTime());
    gc.add(Calendar.MONTH, 1);
    System.out.println(gc.getTime());
    gc.add(Calendar.MONTH, 1);
    System.out.println(gc.getTime());
    gc.add(Calendar.MONTH, 1);
    System.out.println(gc.getTime());
  }
}
 > java PraveenCalendar
   Tue Jan 31 00:00:00 GMT 2006
   Tue Feb 28 00:00:00 GMT 2006
   Tue Mar 28 00:00:00 GMT 2006
   Fri Apr 28 00:00:00 GMT 2006
   Sun May 28 00:00:00 GMT 2006 

Hmm ... looks just like the results I'd expect from RPG IV!

Regards,
Simon Coulter.
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